Improvement in the Sample Mass-Change-Method used for Determination of the Bulk Etch Rate of CR-39 Neutron Detector

2001 ◽  
Vol 40 (Part 1, No. 5A) ◽  
pp. 3474-3475 ◽  
Author(s):  
Null Matiullah ◽  
Iftikhar Ahmad Tahiri ◽  
M. S. Subhani ◽  
Katsuhisa Kudo
Keyword(s):  
Neutron Detector ◽  
Etch Rate ◽  
Mass Change ◽  
Sample Mass ◽  
Bulk Etch Rate

Evaluation of Bulk Etch Rate of Solid State Nuclear Track Detector CR-39

2015 ◽  
Vol 1107 ◽  
pp. 712-715
Author(s):  
Anees A. Al-Hamzawi ◽  
M.S. Jaffar ◽  
Nada F. Tawfiq ◽  
Murtadha Sh. Aswood
Keyword(s):  
Solid State ◽  
Etch Rate ◽  
Solution Concentration ◽  
Track Detector ◽  
Etching Time ◽  
Nuclear Track Detector ◽  
Bulk Etch Rate ◽  
Different Temperatures ◽  
Naoh Solution

In the current study, the bulk etch rate VBof solid state nuclear track detectors SSNTDs CR-39 have been examined at different concentrations of NaOH solution ranged from 4N to 8N and different temperatures of NaOH solution (50, 60, 70, 80°C) for various time intervals of etching (1-10 h); this is done by determination of mass variation via etching time. The results indicate that the bulk etch rate VBincreases with the increase of etchant solution concentration and the temperature of solution. This can be attributed to the increase the thickness of the removed layers h of the detector.

GRACE and GRACE-FO Level-1 V04 Data Processing Status

2020 ◽  
Author(s):  
Christopher Mccullough ◽  
Tamara Bandikova ◽  
William Bertiger ◽  
Carmen Boening ◽  
Sung Byun ◽  
...  
Keyword(s):  
Data Processing ◽  
Attitude Determination ◽  
Precise Orbit Determination ◽  
Mass Change ◽  
Sensor Data ◽  
The Earth ◽  
Analysis Center ◽  
Level 1 ◽  
Gravity Recovery

<p>The Gravity Recovery and Climate Experiment Follow-On (GRACE-FO), launched in May 2018, provides invaluable information about mass change in the Earth system, continuing the legacy of GRACE. Fundamental requirements for successful mass change recovery are precise orbit determination and inter-satellite ranging, determination of the relative clock alignment of the ultra-stable oscillators (USOs), precise attitude determination, and accelerometry. NASA/Caltech Jet Propulsion Laboratory is the official Level-1 data processing and analysis center, and is currently processing software version 04. Here we present analysis of the aforementioned GRACE-FO sensor data, as well a preview of an upcoming GRACE reprocessing, and a discussion of measurement performance.</p>

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